Daniele raises a very important point, with which I agree. In a mail to me on the same question, Ofer said the following:
We are still expecting to announce a stable version by the end of the month (currently dealing with problems caused by new browser versions).
That was more than 3 months ago, and the latest stable version is yet to be released.
His statement about browser versions is an example of why releasing "stable" versions more often than you do is important. I put stable in quotation marks, because though as coders we may only want to declare a really big jump as stable, customers need to know things such as minimum (and maximum) versions of supporting software (browsers, libraries, etc.).
As an example, a software development house I worked at as manager once had a major issue with proving that a customer upgrading their version of .Net caused the crash in (only) our app. It could be proven that Microsoft was at fault, but we had to "fix" our app, because it was the only app they had which used the newly-broken bit in .Net, and the customer had to do the .Net upgrade because of security reasons. So we were forced to write a work-around to a Microsoft bug.
I related the above to show how important it is to stay current without patching. Customers see a long and involved upgrade path from an old stable release to the latest release as a risk.
This very thing is keeping me from doing development in Tersus at the moment. It's half way through 2014, and the most recent officially stable version is more than two years old. The most recent "News" on the home page goes back even further, to 2011. Customers look at this and make a (wrong) judgement on their risk if I use Tersus.
I make these points because although I understand your position from a technical perspective, customers "understand" the situation from a completely different perspective, and we have to take that into account.
Lastly, please make clear the differences between your free and your enterprise versions, including commercials. It shouldn't be a secret.
For best results, use the Firefox browser..